As chaotic as things are with the Rockies pitching staff right now, is this really the time to be adding a top prospect from Double-A? GM Dan O’Dowd obviously thinks so. The club called up Edwar Cabrera today and announced that he’d make his major league debut in starting Wednesday’s game.

He’ll be taking the spot of Alex White, who struggled in both of his outings after the Rockies went to a four-man rotation.

The 24-year-old Cabrera was a late bloomer for Colorado. He didn’t even make his full-season debut until last year, but when he did, he went 8-3 with a 3.34 ERA and a 217/47 K/BB ratio in 167 innings for two A-ball teams. This year, he was 8-4 with a 2.94 ERA and an 82/23 K/BB ratio in 98 innings for Tulsa.

There’s still some skepticism regarding the left-hander. Even though he led the entire minors in strikeouts last year, Baseball America ranked him as the Rockies’ No. 18 prospect entering 2012. While his other numbers this season were great, he had given up 15 homers for Tulsa, a total that suggests he might not be a great fit in Coors Field.

All signs point to Cabrera being used just like the rest of the Rockies’ starters: three days’ rest, 75-pitch limit. That’s the case even though he was used conventionally in the minors: all of his recent starts had come on four days’ rest and he had pitched a total of 22 innings in his last three starts.

Especially in the wake of pitching coach Bob Apodaca’s departure, this seems like the wrong time for the Rockies to be breaking in someone new. Still, I will be very interested to see how Cabrera performs. He has some truly remarkable numbers. In April, he pitched 33 innings and allowed six runs, all of them coming on solo homers. In all, 23 percent of the hits he’s allowed this year have been homers (15 HR, 65 H). No MLB pitcher has ever had such a high ratio in a 150-inning season. Three have in a 120-inning season, and two of those were Coors Field-aided (Scott Elarton in 2001 and Denny Stark in 2002).

Blash, 28, was acquired by the Yankees from the Padres back in December in the Chase Headley trade. In trading Blash to the Angels, the Yankees were able to free up a spot on the 40-man roster for Brandon Drury, the infielder they acquired as part of a three-team trade with the Diamondbacks and Rays on Tuesday.

Over parts of two seasons in the majors, Blash has hit an underwhelming .200/.323/.336 in 279 plate appearances. He will try to play his way into a bench role for the Angels this spring.